Single spindle automatic machine



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SINGLE SPINDLE AUTOIATIC- MACHINE Filed Nov. 14, 1939 1a Sheets-Sheet 18 t cu lu d an" infill-1 53.255! 1 a vlllllllvrlullldn g b ux m tkbxu g Patented Aug. l2, 1%?

; PAT NT SINGLE srmmtr: AU'roMATrdMAonINE Alfred E. Drissner and Kennethw. Barkinen, Cleveland, Ohio, assignors to The National Acme (Jompany, Cleveland, hio,'a corporation of Ohio Application November 14, 1939, Serial No. 304,319

30 Ciaims.

This invention relates to what. are commonly designated as single spindle automatic screw machines. an object of-the invention being to provide an improved machine oi this type'which may be used as a bar machine in which the stock bar is fed through the spindle as in multiple spindle machines or as a chucking machine wherein castings, forgingsand the like may be heldin a chuck located on the front end of the spindle as in multiple spindle chucking machines, one of the principal objects of the invention being to provide a machine of this type in which many, of the mechanisms are hydraulically operated with high speed and accuracy.

Another object of the invention is the provision of an improved machine of this type in which the indexing of the end tool slide turret and the unlocking of the turret is controlled and operated by'hydraulic means and in which the several reciprocating slides of that turret are likewise controlled and operated by hydraulic means as is also the top cross slide of the machine, and in which the chucking meansand return of the stock feed slide are also controlled by hydraulic means, the machine also having fluid controlled means for operating the high and low speed clutch and spindle clutch.

Still another object of the invention is the provision of a low-type, compact, sturdy single spindle machine having a capacity up to approximately diameter stock'and in which all of the operating mechanisms are completely enclosed and protected from dust and dirt and readily accessible to the operator at both sides of the machine and which may be considered as having the same relation to former types of single spindle machines as the present stream-lined automobile has to that of the early 1900's. In short, there is provided an improved single spindle screw machine so constructed that it has a number of the important features heretofore thought possible only in the present multiple spindle machines and whereby this improved single spindle machine will have a larger range of production and greater capabilities of use than has such machines heretofore, and in which the work spindle and the indexible tool turret are both located substantially centrally lengthwise of the machine with their axes in parallelism in the same plane,

thus enabling the building therearound of numerous important improvements readily accessible from either side while insuring a low, compact machine capable of more economical production than has been possible on single spindle type machines.

In machines of this type, the single stock car rying spindle is rotated while the tool carrying turret is indexed and the several tool carrying slides thereof are reciprocated toward and from the work, the side cross and top tools being carchine.

2 ried by cross and top slides and the present improved construction is such that the machine may be carried in a pan adapted to hold a large amount of cutting oil and having a large chip 'space under the main turret slide communicating taken on line 4-4 of Fig. 1.

Fig. 5 is a longitudinal'sectional view of the spindle rotating or driving means. i

Fig. 6 is a similar view illustrating, however, one of the driving shafts for the spindle provided with clutches for imparting different speeds to the work spindle.

Fig.7 is a cross sectional view on line l'? of Fig. 6, illustrating the use of an idler gear whereby the work spindle maybe rotated in either direction.

Fig. 8 illustrates the operating mechanism for the top slide.

Fig. 9 is a view of the opposite side of the mechanism shown'in Fig. 8. 1

Fig. 10 is a sectional view 'of the high speed drive shaft of the machine.

Fig. 11 is a cross sectional view of Fig. 10.

Fig. 12 is a sectional view of the driving means for the high speed shaft shown in Fig. 10.

Fig. 13 is a cross sectional view taken on line i3l3 ofFig. 11.

Fig. 14 is a partly sectional view of, the control means for the high and low speeds of. the ma- Fig. 16 is a detail sectional view of the worm Fig. 21 is 'a sectional view taken on line 2|--2l of F18. 19.

Fig. 22 is a longitudinal sectional view of the pusher for the turret slides.

aasasos Fig. 23 is a left hand end View of the pusher broken away in Fig, 22.

Fig. 24 is a view of the hydraulic feed control bfthe tool turret.

Fig. 25 isa vertical sectionalview taken on line 2625 of Fig. 24,

Fig. 26 is a partly sectional view of the clutch shifting mechanism for giving different speeds slide mechaechanism. Fig. 31 is a cross section taken on line fl-fl of Fig. 30, and

Fig. 32 is a diagrammatic view of the hydraulic pistons and controlling valves therefor and including the motor pump and reservoir.

-Similar characters of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and mode of operation thereof, we

desire to have it understood that the invention is not limited to the details of construction and arrangement of parts illustrated in the accompanying drawings since the invention is capable of other embodiments, and that the phraseology employed is for the purpose of description and not of limitation.

Genefal description Referring to Fig. 1. this improved single spindle machine comprises a pan-shaped base i adapted to carry the entire machine having a framework or housing cons*ting of a gear box housing '2, an end tool turret index mechanism housing 3 and a feeding and chucking mechanism housing, 4 in which are located the main drive motor 5 at the rear side thereof and the hydraulic motor 0, pump i and hydraulic and lubricating oil reservoir I at the front side thereof.

Supported at one end by the turret index mechanism housing 3 and at its other by the main frame is the indexible slide support 8 for the four main turret slides I shifted individually when indexed in line with the spindle by hydraulic means and the feeds of which may be varied.

A rear side cross slide ll angularly mounted, a front side cross slide horizontally mounted and a top slide 12 for the side tools are supported around the work spindle 2! in front of the gear box housing 2 and located above the rear cross slide are spindle change gears l3. Located on the rear wall of the gear box housing 2 are feed change gears, hereinafter referred to, for the two side cross slides which are cam and lever operated, whereby various feeds may be given these two slides. the diflerent feeds of the top slide which is fluid operated being obtained by means of a fluid controlling valve. These three slides are of very heavy construction to withstand exceptionally coarse feeds of the forming and cutting of! tools.

Located in the tool turret index housing 3 is the hydraulic motor l5, hereinafter referred to, and in this same turret housing is located the turret lock bolt mechanism l6. At both sides of the turret and extending above the pan are chip guards l1 between which ample chip and cutting oil space It is provided communicating with a .u; -immlmnhorseman M aim n9 amnle size. It

- will be observed (see Fig. 1). that the end housing supporting frame 8 is arch-formed, thereby providing an enlarged chip clean-out passage or opening 20 so that the chips may be readily removed from the end of the machine without the necessity of stoppin the machine, as heretofore, in order to remove the chips at the sides thereof. At one side of the spindle and carried by the housingis an auxiliary support II for an additional tool attachment. Encircled by the cross and top slides is the rotary work spindle 2|, rotatable in either direction, and carried by the corner of the square turret slide support is asuitable stock stop If, and it will be observed that the end tool turret or tool slide carrier is located below the center of the work spindle and comprises independent tool slides operated from within the turret for carrying the end working tools and that it is not a round turret or one located above the center of the worl; spindle as in certain old machines.

As before stated, the machine is adapted for use as a bar'machine but has a removable nose piece 8 (see Fig. 5) on the spindle adapted for attachment of a chuck so that the machine may be used as a chucking machine. When used as a chucking machine, the collet and feed tubes are removed. 1

The indexing mechanism for the tool turret and the locking thereof are hydraulically controlled independently from the forming and cutoff slides, The turret slides are also controlled hydraulically with independent controlling means for fast and slow speed of each independent turret slide.

The front and rear forming slides are controlled by independent cams which will permit continuous forming while the turret slides advance, return and index, so that this entirely separates the end working tools from the forming tools carried by the cross slides. This is very desirable especially on work where the forming operation takes longer and several different types of end working tools are necessary to complete work during the actual forming time.

A cut-oi! slide can be mounted on the machine and used as an independent attachment and may have its own independent controlling means but where this is not needed the rear forming slide can be used as a cut-off slide.

The chucking mechanism is likewise completely hydraulically controlled and the stock feed mechanism is timed with the chucking mechanism so that no extra cams and mechanism are required to adjust and time the feeding device for the stock.

By having the large chip space directly under the turret slide whereby the chips can be removed from the front of the machine through the chip clean-out passage, this eliminates the down time for the machine while removing the chips, that is to say, the chips can be removed without stopping the machine and also provides a means, as hereinbefore stated, for the chip conveyor when required and an especially large bottom surface for the cooling and cutting oil.

The main motor I, mounted at the rear end side of the machine, is adjustable and completely housed so that it does not obstruct the top and general design of the machine and this is also true of the hydraulic pump motor t and pump 0' whereby they are easily accessible by merely removing the cover and the general construction of the machine is such that all necessary piping for the hydraulic mechanism is completely enclosed 

